Bolt-lock



' (No Model.)

B. D. GALBREATH, W. DUNKLE & B. CHAPMAN.

BOLT LOGK.

Patented-Nov. 26, 1889.

.C Q wefl I 1 M 1 M I. W? min W 5% 11w UNITED STATES PATENT OFFICE.

EDMoN D. eALEEEATn, WILLIAM DUNKLE, AND BYRON CHAPMAN, 0E LINDEN, INDIANA.

BOLT-LOCK.

SPECIFICATION forming part of Letters Patent No. 415,711, dated November 26, 1889. Application filed May 16, 1889. Serial No. 310,960. (No model.)

T 0 all whom it may concern:

Be it known that we, EDMON D. GAL- BREATH, WILLIAM DUNKLE, and BYRON CHAPMAN, citizens of the United States, residing at Linden, in the county of Montgomery and State of Indiana, have invented a new and useful Bolt-Lock, of which the following is a specification.

This invention has relation to bolt-locks. Among the main objects in view are to obviate the employment of a nut and the necessity of threading the bolt, to facilitate the ap plication and removal of the lock, to render the same adjustable for the securance of two or more bodies varying in thickness, and withal to provide an easily-adjusted, inexpensive, and efficient lock, devoid of any possibility of loosening, and this at a minimum cost of manufacture.

Other objects and advantages of the invention will hereinafter appear, and the novel features thereof will be particularly pointed out in the claims.

Referring to the drawings, Figure l is a sectional View of arailway-rail joint provided with fish-plates secured thereto witha boltlock constructed in accordance with our invention. Fig. 2 is a side elevation of the same, and Fig. 3 is also a side elevation, the locking-plate being in a position to be withdrawn or inserted. Fig. a is a detail in perspective of the bolt; Fig. 5, of the lockingplate; Fig. 6, of the locking-pin. Fig. 7 is a modified construction of locking-plate,whereby the same is especially adapted for certain purposes.

Like numerals of reference indicate like parts in all the figures of the drawings.

1 represents the bolt, to the end of which is integrally formed the usual head 2. The opposite end of the bolt is provided with opposite inclined notches 3, which terminate in shoulders at at their outer ends and give the bolt, when viewed in side elevation, an arrow-head appearance. The extreme end of the bolt is preferably rounded, and is oppositely and longitudinally slotted, as at 5, the

slots being divergent from the extremity and subdividing the two opposite inclined notches 3. The body of the bolt, it will be observed, is perfectly plain and no screw-threads employed,and we also avoid, as will also be apparent, the employment. of the usual nut.

6 represents a longitudinally wedge-shaped locking-tappmt, which is provided withakeyhole slot 7, the end of which is circular, as at S, and of a size approximating the diameter of the bolt. The remainder of the slot, however, or that portion designated as 9, is reduced, or of a width less than the circular portion 8, and agrees with the distance through the bolt when taken at a point 0pposite the shoulders l, in which the inclined notches 3 terminate, and the walls of the slot 9 are also inclined or flared to agree with the slanting notches of the bolt, and adapted to snugly yet easily fit the same, in which position the shoulders 4 overlap the outer surface of the tappet 6. The opposite walls of the slot 9 are transversely serrated, as at 10, the serrations of one wall being directly opposite those in the opposite wall, and with each pair of serrations the divergent .opposite slots or grooves 5, formed in the end of the bolt 1, are adapted to register.

11 represents the locking-pin which we prefer to employ, though we do not limit our invention to the use of this particular form of pin, but at the same time have selected this form for the reason that it possesses advantages hereinafter apparent. The pin consists of a piece of resilient steel Wire of sufficient strength for the purpose in view, which is coiled at its center, as at 12,,to form an eye, and terminates in opposite compressible divergent arms 13.

The operation of our invention is as follows: The bolt is first inserted through the opening A of the fish-plate A and rail B, the head 2 of the bolt resting against the outer surface of the fish-plate in the usual manner, or against an interposed washer, and the opposite end of thebolt projecting through the opposite fishplate. The tappet 7 is now introduced over the end of the bolt, the bolt passing through the opening 8, and the longitudinal slot being aligned with the inclined notches 3. By a few taps of the hammer the wedge-shaped tappet is made to ride forward and the slot 9 embraces the oppositely-inclined notches 3, and in this manner the bolt is bound tightly in position. hen the wedge-shaped tappet has been forced upon the bolt as far as possible, it will be seen that the shoulders 4 of the inclined recesses 3 bind upon the upper surface of the tappet, and that the opposite divergent moves or slots 5 will register with one pair of the series of teeth or notches 10, formed in the opposite walls of the slot 9. By any suitable handtoolsas a pair of pinchersthe opposite spring-arms of the key 11 are compressed and introduced into the ends of the divergent grooves or slots 5, and also into the corners of the opposite teeth with which the grooves register. By reason of the inclination of these grooves and the teeth, and also of the opposite spring-arms, it is impossible for the pin to withdraw from its position unless removed by some person. To remove the lock it is simply necessary to insert a pin through the eye of the locking-pin and draw the same from the seat, when by a few taps of a sledge or other hammer upon the wedge end of the tappet the latter is driven from under the shoulders of the bolt, and the opening 8 in the tappet registers with the bolt and permits the tappet to be withdrawn.

Referring to Fig. 7, which is a slightlymodified form of tappet or locking-plate, it will be seen that instead of making the tappet of awedge shape we will slightly curve the same, so as to touch the object bound only at the two ends, such a construction being especially designed for use in connection with railway-joints and other metallic bodies influenced by the heat and cold, and therefore subject to shrinkage and expansion.

WVe do not limit our invention to the exact details herein shown and described, as, if desired, the end of the locking-bolt in which the pin is inserted may be extended in the shape of two jaws, the locking-pin resting therein, the end of the bolt being transversely grooved, so that an ordinary pin may be inserted into the eye of the locking-pin for the purpose of withdrawing the same.

The cylindrical opening 8 of the tappet is considerably larger in diameter than the slot in the tappet with which it communicates, and said opening is sufliciently large to admit of the insertion therethrough of the advanced head of the bolt, and the slot in the tappet is just large enough for the reception of the bolt at its notched portion, so that when as sembled the head of the bolt overlaps each edge of The slot. By this the bolt is prevented from rotation. The walls of the longitudinal slot of the tappet are inwardly inclined to agree with the arrow-shaped notches, and by such a construction the terminals of the locking-pin beyond. the tappet enter grooves formed in the faces of the notches, and thus each arm of the pin takes connection at two points of the bolt and intermediate those points with the teeth of the tap pet.

Having described our invention, what we claim is v 1. In a bolt-lock, a bolt having opposite inclined notches, terminating in shoulders near its end, and provided with opposite divergent grooves,'in combination with a wedge-shaped tappet having a key-hole slot, the slotted portion of which is of a size adapted to embrace the bolt at its recessed portion, and provided with opposite teeth, and a pin adapted to be inserted in the grooves and coact with the teeth, substantially as specified.

2. In a bolt-lock, a bolthaving opposite recesses terminating in shoulders, said recesses being inclined and opposite grooves formed in the bolt, in combination with a wedgeshaped tappet having a key-hole slot, the straight portion of which is inclined and provided with opposite teeth adapted to register with the grooves in the bolt and embrace the same at its notched portion, and a key having oppositely and divergently disposed compressible arms adapted for insertion in the slot and teeth, substantially as specified.

3. The bolt 1, having a head 2, the opposite recesses 3 terminating in the shoulders at, and the opposite divergent grooves 5, in combination with the wedge-shaped tappetG and the slots 7,comprising the cylindrical portion 8 and straight portion 9, the walls of which are downwardly inclined and provided with opposite teeth 10, and the spring-key 11, coiled to form the eye 12, and opposite divergent compressible arms 13, substantially as specified.

In testimony that we claim the foregoing as our own we have hereto affixed our signaturesin presence of two witnesses.

EDMON D. GALBREATH. \VILLIAM DUN KLE. BYRON CHAPMAN. Witnesses:

JONATHAN D. J ONES, WILLIAM R. MoRFoRD. 

